生物絮凝沉淀-氧化沟工艺处理造纸中段废水

采用生物絮凝沉淀-氧化沟工艺处理造纸中段废水的工程实践表明,在不加药和少加药的情况下,该工艺出水水质良好,可分别达到<造纸工业水污染物排放标准>(DB 37/366-2003)的第1和第2阶段标准,且运行成本适中,经济效益明显.     

用生物膜法-化学絮凝法组合工艺处理造纸中段废水

以吉林造纸厂污水处理场为例，介绍了采用生物膜法（指生物接触氧化法）化学絮凝法组合工艺处理造纸中段废水的工艺路线。造纸中段废水ＣＯＤＣｒ含量较高，一般在１０００ｍｇ／Ｌ左右，采用生物膜法工艺，ＣＯＤＣｒ去除率只能达到３０％左右；而采用生物膜法化学絮凝法组合工艺，ＣＯＤＣｒ去除率可达６５％以上，处理后水质达到了国家排放标准，解决了该造纸厂的实际问题     

ABR-接触氧化-混凝沉淀工艺处理印染废水

采用ABR-接触氧化-混凝沉淀工艺处理印染废水,工程实践表明,出水完全达到《纺织染整工业水污染物排放标准》(GB 4287-92)一级排放标准,CODCr和色度去除率均达到90%以上.该工艺处理效果优良,系统运行稳定,运行费用较低.     

草浆中段废水混凝沉淀-厌氧-好氧生物处理的工艺研究

通过对草浆中段废水混凝沉淀－厌氧－好氧生物处理组合工艺的试验研究，探索该工艺的可行性，确定了适用、高效、价廉的混凝剂处理效果，同时考察了不同负荷下，垂直折流板式厌氧污泥床（ＶＢＡＳＢ）和接触氧化法对草浆中段废水处理效果的影响。结果表明，当ＦｅＳＯ４和ＰＡＭ投加量分别为３００ｍｇ／Ｌ和１０ｍｇ／Ｌ时，ＣＯＤ和ＳＳ去除率分别为４０％和９５％；垂直折流板式厌氧污泥床在负荷为３１～４３ｋｇＣＯＤ／（ｍ３·ｄ）时，ＣＯＤ去除率约为５５％；接触氧化池负荷为１５～２０ｋｇＣＯＤ／（ｍ３·ｄ）时，ＣＯＤ去除率为５０％，可以使出水达到国家标准     

水解酸化-生物接触氧化-混凝沉淀工艺处理制药废水

采用水解酸化-生物接触氧化-混凝沉淀工艺处理中成药制药厂生产废水,处理水量200 m3/d,进水CODCr约852 mg/L.监测结果表明,处理后CODCr、BOD5、SS和色度的去除率分别为94%、96.1%、86.9%和94.3%,出水CODCr、BOD5、SS和色度分别为75 mg/L、18 mg/L、36 mg/L和40倍,出水各项指标符合《污水综合排放标准》(GB 8978-1996)一级标准.     

混凝沉淀-ABR-接触氧化工艺处理纱线染整废水

采用混凝沉淀—ABR—接触氧化工艺处理纱线染整废水,并对工艺单元的特点和运行情况进行了分析。运行结果表明,混凝沉淀池对CODCr和色度的去除率分别为50.5%和76.9%;ABR和接触氧化池的容积负荷分别为0.73kgCODCr/(m3.d)和0.43kgCODCr/(m3.d);处理后出水CODCr<85.5mg/L,色度<40倍,系统对CODCr、BOD5、SS、色度和硫化物的平均去除率分别为89.8%、92.1%、82.8%、95.2%和99.2%。     

制革废水治理工程一例

江门市天成皮革厂总废水量为６００ｍ３／ｄ ，采用先对混合废水中的油脂、硫化物、含铬化合物进行物理化学法预处理，再进行接触氧化混凝过滤的处理工艺，出水可达到国家排放标准     

Fenton-混凝沉淀-接触氧化工艺处理涂装废水

针对汽车零部件涂装废水中含有树脂、阴离子表面活性剂、油漆、颜料等污染物,特别是其中的喷漆废水成分复杂、浓度高,可生化性差,采用Fenton-混凝沉淀-接触氧化工艺处理取得了良好的效果,出水各项指标均达到<污水综合排放标准>(GB 8978-1996)一级要求.     

水解酸化-接触氧化-混凝沉淀处理酱油酿造废水

南方某酱油酿造企业产生废水整体呈现为较高的BOD、COD、SS和色度等特征,总排放量约330 m~3/d.针对其水质特征,采用水解酸化-接触氧化-混凝沉淀处理工艺.工程实践表明,该工艺对有机物、氨氮、色度、悬浮物均具有较好的处理效果,出水达到<污水综合排放标准>(GB 8978-1996)一级标准.     

CSBR-混凝沉淀组合工艺处理印染废水

印染废水色度大,有机物含量高,可生化性差,且水量和水质变化大,水质成分复杂,针对上述特点,采用了CSBR-混凝沉淀组合工艺处理印染废水,运行结果表明,在进水CODCr为1 200mg/L、BOD5为350 mg/L、SS为200 mg/L、色度为400倍、pH为11.5时,出水水质达到《纺织印染行业水污染物排放标准》(GB 42872-92)二级标准.该处理系统耐冲击负荷能力强,运行稳定,剩余污泥量少,基建和运行费用较低.     

污水生物处理中微生物次级代谢产物的研究进展

就污水生物处理过程中微生物次级代谢产物的生成特性及其影响的研究进行了综述。溶解性微生物产物和胞外聚合物是污水生物处理工艺过程中微生物次级代谢的主要产物,其相对分子质量分布、生物可降解性、螯合性、毒性等能说明生物处理系统的整体运行状况;而进水浓度、SRT、HRT、OLR(有机负荷率)等系统运行参数也影响微生物次级代谢产物的生成与性质。目前,有关污水生物处理中微生物次级代谢产物的研究还很不完善,很多问题有待进一步研究。     

Synergistic effect of biological activated carbon and enhanced coagulation in secondary wastewater effluent treatment

The use of secondary wastewater effluent (SWWE) is an essential strategy for making better use of limited water resources. However, a wide range of organic compounds eventually renders them unsuitable for recycling. In water treatment processes, biologically activated carbon (BAC) is adopted after physicochemical treatment. However, the effectiveness of such combination for SWWE remains poorly understood. This study investigates the effectiveness of various combinations: BAC/enhanced coagulation (EC) or EC/BAC, especially in terms of dissolved organic carbon (DOC) removal. The results showed that distinct advantage could be obtained by adopting BAC/EC combination rather than EC/BAC, as microbes in BAC not only remove non-coagulable compounds but also synergize the removal efficiency by releasing some coagulable humic substances.     

络合沉淀工艺处理氰化电镀废水

将络合沉淀工艺用于实际工程去除氰化电镀废水中含氰络合离子。实践证明,对总氰化物、六价铬、总铬、总镍和总铜的去除率分别可以达到93.77%、99.99%、99.83%、99.98%和98.63%,且该工艺运行费用低,出水水质符合广东省地方排放标准《水污染物排放限值》(DB44/26—2001)的要求。     

村镇生活污水处理技术整合研究

通过对江苏省村镇生活污水处理的调研和考察,结合当前村镇的社会、经济实际情况,提出了村镇生活污水处理技术整合研究的观点。着重介绍了生活污水净化沼气池、人工湿地的处理技术及其整合处理技术的试点实施方案。     

Simultaneous wastewater treatment and biological electricity generation.

It is possible to directly generate electricity using bacteria while accomplishing wastewater treatment in processes based on microbial fuel cell technologies. When bacteria oxidize a substrate, they remove electrons. Current generation is made possible by keeping bacteria separated from oxygen, but allowing the bacteria growing on an anode to transfer electrons to the counter electrode (cathode) that is exposed to air. In this paper, several advances are discussed in this technology, and a calculation is made on the potential for electricity recovery. Assuming a town of 100,000 people generate 16.4 x 10(6) L of wastewater, a wastewater treatment plant has the potential to become a 2.3 MW power plant if all the energy is recovered as electricity. So far, power densities are low, resulting in power generation rates of 150 kW/m2. Progress is being made that we believe may result in as much as 0.5 MW from wastewater treatment. The generation of electricity during wastewater treatment may profoundly affect the approach to anaerobic treatment technologies used in wastewater treatment.     

蒸氨-浓缩工艺处理沉钒废水的工程应用

将经过还原、中和沉淀处理后的沉钒废水,进一步采用蒸氨-浓缩工艺处理.运行结果表明,处理后的废水氨氮浓度小于300mg/L,能够达到沉钒工艺回用水要求.通过改造,该工艺实现了废水的"零"排放和氨氮、硫酸钠的回收利用,是沉钒废水处理比较理想的工艺,在钒制品加工领域具有很好的推广前景.     

Conditions and technologies of biological wastewater treatment in Hungary

A survey has been carried out involving 55 Hungarian wastewater treatment plants in order to evaluate the wastewater quality, the applied technologies and the resultant problems. Characteristically the treatment temperature is very wide-ranging from less than 10 °C to higher than 26 °C. Influent quality proved to be very variable regarding both the organic matter (typical COD concentration range 600-1,200 mg l(-1)) and the nitrogen content (typical NH(4)-N concentration range 40-80 mg l(-1)). As a consequence, significant differences have been found in the carbon availability for denitrification from site to site. Forty two percent of the influents proved to lack an appropriate carbon source. As a consequence of carbon deficiency as well as technologies designed and/or operated with non-efficient denitrification, rising sludge in the secondary clarifiers typically occurs especially in summer. In case studies, application of intermittent aeration, low DO reactors, biofilters and anammox processes have been evaluated, as different biological nitrogen removal technologies. With low carbon source availability, favoring denitrification over enhanced biological phosphorus removal has led to an improved nitrogen removal.